/*
 * This file Copyright (c) 2015. Walle.
 * (http://www.wallellen.com). All rights reserved.
 *
 *
 * This file is dual-licensed under both the
 * Walle Agreement (WA) and the GNU General Public License.
 * You may elect to use one or the other of these licenses.
 *
 * This file is distributed in the hope that it will be
 * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
 * implied warranty of MERCHANTABILITY or FITNESS FOR A
 * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
 * Redistribution, except as permitted by whichever of the GPL
 * or WA you select, is prohibited.
 *
 * 1. For the GPL license (GPL), you can redistribute and/or
 * modify this file under the terms of the GNU General
 * Public License, Version 3, as published by the Free Software
 * Foundation.  You should have received a copy of the GNU
 * General Public License, Version 3 along with this program;
 * if not, write to the Free Software Foundation, Inc., 51
 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * 2. For the Walle Agreement (WA), this file
 * and the accompanying materials are made available under the
 * terms of the WA which accompanies this distribution, and
 * is available at http://www.wallellen.com/agreement.html
 *
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
 */

package com.wallellen.core.auth.util;

import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.Enumeration;

/**
 * Created by walle on 12/9/15.
 */
public class KeyUtil {
    private static String errorkey = "ERROR";
    private static String CODE_C = "wallellen.com";

    public static void main(String[] args) {
        System.out.println(getFkey("0C9-19F43AE3A226"));
        System.err.println(getMKey());
    }

    public static String getFkey(String mkey) {
        return new MD5().getMD5ofStr(mkey + CODE_C).substring(0, 12);
    }

    public static String getMKey() {
        Enumeration netInterfaces = null;
        try {
            netInterfaces = NetworkInterface.getNetworkInterfaces();
            StringBuffer sb = new StringBuffer();
            while (netInterfaces.hasMoreElements())
                try {
                    NetworkInterface ni = (NetworkInterface) netInterfaces.nextElement();
                    byte[] macs = ni.getHardwareAddress();

                    if (macs != null) {
                        String mac;
                        for (int i = 0; i < macs.length; i++) {
                            mac = Integer.toHexString(macs[i] & 0xFF);
                            if (mac.length() == 1) {
                                mac = '0' + mac;
                            }
                            sb.append(mac + "-");
                        }
                    }
                } catch (Exception e) {
                }
            String key = new MD5().getMD5ofStr(sb.reverse().toString() + CODE_C);
            return key.substring(0, 3) + "-" + key.substring(3, 15);
        } catch (SocketException e) {
        }
        return errorkey;
    }
}
